Improvement in steam-generators



' boiler and its appurtenances.

UNITED STAT-Es- PA'TENr OFFICE.

GEORGE H. RARoOoK, or APIAINEIELD, nEw JERSEY, AND srEPHEN wiLooX, OE BROOKLYN, NEW'YORK. 1 v

IMPROVEMENT IN STEAM-GENVERATORS.

Specification forming part of Letters Patent No. 136,691, dated March 11, 1873.

To all whom it may concern.'

Be it known that we, GEORGE H. BABoooK,

.of Plainield, Union county, New Jersey, and

STEPHEN WILGOX, of Brooklyn, Kings county, State of New York, have invented certain Improvements in Steam Generators, of which the following is a specification:

This invention `is applicable to that form of steam-boilers known as the upright or vertical tubulary and its object is to prevent the evils due to foaming or priming, enabling the boiler to furnish dry steam or superheated l steam, if desired; also to improve the circulation with its well-known advantages.

It consists in the introduction of a horizontal partition or baffle plate, placed at about the point it is desired to carry the water level, through suitable perforations in which the lluetubes pass. (Batlle plates for directing the course of the draft in boiler-dues are common,

' and, as we use our plate to direct the current that point.

The followingis a description of whatwe consider the best means of carrying out the invention:

The accompanying drawing forms a part of I this specification.

Figure '1 is a vertical section through the Fig. 2 is a horizontal section on the line s s, Fig. 1.

Similar letters of reference indicate like parts in both the iigures.

A is the boiler-shell; B, the internal shell or furnace; C, the grate D,the tubes; andE, the smoke-bonnet. Mf is the horizontal partition or bafde plate; G, the circulator; H, the descending-tube, iixed in the center of the baffleplate, leaving suicient space between it and the crown-sheet of the furnace for all the water that may dow down H to pass freely under its lower edge and rise anong the tubes.

The baffle-plate extends from H nearly to the center of the outer row of tubes, but may be varied considerably in diameter without seriously affecting its efficiency, care being taken that there is sufficient space between it and the upper edge of eiroulator Gr for the free escape of the upward stream of steam and water generated by the heating-surface. The battle-plate M and circulator Gr are connected to the boiler-shell A by light stays, not shown.

The benefit of some portions of our invention may be realized, to some extent, without the others; but we prefer the whole in combination, as shown.

Operation.

v Upon building a fire in the furnace the mass of water surrounding the furnace and tubes land filling the $13306 Within circulator G beplate M, is compelled to iiow oft' laterally and escape through the space between baffle M and circulator Gr. The steam separates rapidly after rising past this point, and the water flows outward over the upper edge of G, resuming its proper specific gravity, and descends, passing inward under the lower edge OfG and in contact with the heating-surface, again to be made light by having steam mingled with it and to continue its circuit as long as the tire is maintained.

Most of the water, as described, flows over the top of circulatorG, but a portion moves inward across the baffle-plate, and flows down through the tube H in its center, thus keeping up a current over the center of the crownsheet and among the tubes.

It will be observed that steam is taken off from the center of the boiler through pipe a, and as the steam rises at the outer edge of the baffle-plate it must dow inward between and around the upper ends of the tubes on its way to the exit and become `thoroughly dried.

In ordinary upright boilers, worked Vup to their rated power, it is necessary to carry the water low, whereby a large percentage of the tube-surface is above the water-line and relatively inefticient.

When the invention is used the baffle-plate can be placed near the top ot' the tubes, and,

as thewater will be carried up against the B. and-tubes D, n.11' arranged for joint operabae-nla-te, almost the e'nire tube-snrface will tion, as and for the purposes herein set forth.

be eoient steam-generating surface. In'testim'ony whereof We have hereunto set We claim as our inventionour hands this 7th day of J anuary, 1873, in the 1. The baffe-plate M` arranged rela-tively to presence of two subscribing witnesses.

the upright tubes D and boi1er-she11A,as and Y V GEO. H. BABCOCK.

for the purpose herein set forth. Witnesses; STEPHEN WILCUX.

2. The oiroulator G and ba-fe-piate M, in WM. C. DEY,

combination with the boilenshell A, furnace ARNOLD HRMANN. 

